Remember the rush of whizzing uncontrolled down a snow-covered hill on your beat-up Flexible Flyer? Thanks to more-comfortable, easier-to-maneuver sleds for grown-ups, now you can reclaim that thrill—with just a little adult discretion mixed in. But fun isn't the only benefit of grown-up sledding: You can torch 400-plus calories (based on a 150-pound woman) if you hit the hills for an hour.
